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Rotation around point

/ Published in: ActionScript 3
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  1. private function rotateAroundInternalPoint(m:Matrix, x:Number, y:Number, angleDegrees:Number):void {
  2. 	var p:Point = m.transformPoint(new Point(x, y));
  3. 	rotateAroundExternalPoint(m, p.x, p.y, angleDegrees);
  4. }
  5.  
  6. private function rotateAroundExternalPoint(m:Matrix, x:Number, y:Number, angleDegrees:Number):void {
  7. 	m.translate(-x, -y);
  8. 	m.rotate(angleDegrees * (Math.PI / 180));
  9. 	m.translate(x, y);
  10. }

URL: http://www.joelconnett.com/flex-rotation-around-a-point.html

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